Your glutes, hips and thighs includes some of the most important, and powerful, muscles in the human body. In fact, your lower body includes the biggest muscle in the body - Your butt, also known as the gluteus maximus. Aside from wanting a firm, shapely butt, it's important to train your lower body simply because they're involved in so many movements. Sit, stand, squat and walk and your glutes are working, and think about how many times you do that in one day. ~ Berceste